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Note 10 - Financial Information about Geographic Areas (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
   

For the Three Months Ended

   

For the Nine Months Ended

 
   

September 30,

   

September 30,

 
   

2022

   

2021

   

2022

   

2021

 

Net sales by geographic region

                               

United States

  $ 14,569,000     $ 14,244,000     $ 48,385,000     $ 52,836,000  

International

    153,000       231,000       1,371,000       2,606,000  
                                 

Consolidated net sales

  $ 14,722,000     $ 14,475,000     $ 49,756,000     $ 55,442,000  
   

September 30,

   

December 31,

 
   

2022

   

2021

 

Long-lived assets by geographic region

               

United States

  $ 4,428,000     $ 4,623,000  

International

    1,345,000       1,441,000  
                 

Consolidated total long-lived assets

  $ 5,773,000     $ 6,064,000